Naturally derived micelles for rapid in vitro screening of potential cholesterol-lowering bioactives     

Kirana C  Rogers PF  Bennett LE  Abeywardena MY  Patten GS 《Journal of agricultural and food chemistry》2005,53(11):4623-4627

A high plasma cholesterol level, especially low-density lipoprotein cholesterol, indicates increased risk of cardiovascular diseases. Plasma cholesterol levels are influenced by diet and cholesterol biosynthesis, uptake, and secretion. Cholesterol uptake involves solubilization into complex phospholipid spherical bodies termed micelles that facilitate the transport of lipids through the gut brush border membrane into enterocytes. In vitro assays reported to date to determine potential cholesterol-lowering effects of various compounds require artificial micelle preparations that are elaborate and time-consuming to prepare. The aims of this study were to compare the efficacy of artificially prepared micelles with naturally derived micelles from pig's bile and to test their ability to assess potential inhibitors of cholesterol uptake. The suitability of pig's bile-derived micelles was tested both at the level of the micelle and at cellular uptake using cultured Caco-2 cells. Known cholesterol uptake inhibitors at the micelle (green tea catechins) and at the Caco-2 cell (beta-lactoglobulin-derived peptide, IIAEK) were used as reference inhibitory compounds. It was concluded that pig's bile was a rapid, reproducible, convenient, and cost-effective source of micelles for cholesterol micelle solubility and cellular uptake assay systems and is suitable for screening purposes focused on identifying potential cholesterol-lowering agents.  相似文献   

CBD特色街道开放空间规划设计探讨     

黄建军  秦华 《南方农业》2007,1(1):41-46

通过对CBD特色街道基本类型的划分,探讨了CBD特色街道开放空间的典型视觉形象特征,进而分析并总结了三大类型的CBD特色街道开放空间的规划设计要点。  相似文献   

采取多种措施提高蚕种质量     

孙林秋  黄建军 《中国蚕业》2006,27(2):45-47

蚕种质量内在指标的考核有微粒子病毒率、孵化率、杂交彻底率和良卵率等四方面,如其中有一项质量指标不合格,即判定为这批蚕种不合格。蚕种质量外在指标主要是指蚕种成品的包装,它的质量好坏反映了一个场内在的管理水平。作为专业生产蚕种的企业,唯有坚持“质量第一,信誉第一,服务第一,用户第一”的理念,才能在激烈的蚕种市场竞争中占有一席之地。现将本场多年来提高蚕种质量的综合措施总结如下。1始终坚持以防微为中心的质量管理20世纪90年代前期,蚕种生产受到了微粒子病的危害,有的蚕种场甚至到了停业整顿的地步。镇江蚕种场从1995年起经…  相似文献   

香艳梨果实的营养成分分析   总被引：1，自引：0，他引：1  

黄建军  赵玺宏 《内蒙古农业科技》1994,(4):24-25

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同源重组探针在暂时转化的烟草原生质体内重组和缺失     

徐璧文 Lurq.  PF 《浙江农业大学学报》1991,17(3):225-230

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Differential Thermal Study of Pyrosynthesis     

Bollin EM  Dunne JA  Kerr PF 《Science (New York, N.Y.)》1960,131(3401):661-662

Equipment is described which provides a thermal record of the synthesis of sulfides and related minerals contained in easily constructed tubular glass vials. As an example, a temperature curve for the synthesis of galena (PbS) is given. Similarly derived temperatures of formation for eight other synthetic sulfides and selenides are reported.  相似文献   

Characterization of feline T cell receptor gamma (TCRG) variable region genes for the molecular diagnosis of feline intestinal T cell lymphoma     

Moore PF  Woo JC  Vernau W  Kosten S  Graham PS 《Veterinary immunology and immunopathology》2005,106(3-4):167-178

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Enlargements of the distal third metacarpus and metatarsus in Thoroughbred foals at pasture from birth to 160 days of age     

Gee EK  Firth EC  Morel PC  Fennessy PF  Grace ND  Mogg TD 《New Zealand veterinary journal》2005,53(6):438-447

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Articular / epiphyseal osteochondrosis in Thoroughbred foals at 5 months of age: influences of growth of the foal and prenatal copper supplementation of the dam     

Gee EK  Firth EC  Morel PC  Fennessy PF  Grace ND  Mogg TD 《New Zealand veterinary journal》2005,53(6):448-456

AIMS: To determine the influence of copper (Cu) supplementation by injection of mares in late gestation on the frequency and severity of osteochondrosis (OC) lesions in their foals at around 160 days of age. To determine if there was any influence of the concentration of Cu in the liver, growth rate, birthweight, weight at 160 days of age, fatness, sex, or year of birth of the foal on the frequency and severity of OC lesions. To determine the influence of dam's age, and sex and birthweight of the foal on the growth rate from birth to 160 days of age, and weight at 160 days of age. METHODS: Thirty-three Thoroughbred foals, born in two consecutive years, were weighed every 2 weeks from birth. The dams had been supplemented with parenteral Cu or saline during late gestation, and the supplementation regimens were different in each year. Foals had liver biopsies harvested at birth for determination of Cu concentration. Pasture samples were collected every 4-8 weeks for analysis of concentration of Cu and zinc (Zn). At 160 days of age, articular cartilage of long bones was examined. Gross lesions were counted and scored, then sawn and radiographed, and processed for histopathology. Lesions were given radiographic scores and histopathological scores. Maximum scores for each lesion were combined to give a total OC score for each joint and each foal. The fatness of 20 foals (10 each from Years 1 and 2) at 160 days of age was determined chemically. RESULTS: Supplementation of dams with Cu had no significant effect on the concentration of Cu in the liver of foals at birth, or on the frequency or severity of lesions in articular cartilage at 160 days of age. The Cu and Zn concentrations of pasture were similar in Years 1 and 2, and were lower than current recommendations. All foals in Year 2, and 9/10 foals in Year 1 had irregularities in cartilage that was confirmed histologically to be indicative of OC. The average number of lesions per foal was 4.7 (SD 1.1) and 5.7 (SD 1.1) in Years 1 and 2, respectively. However, the severity of the lesions was considered mild, and no foals showed any clinical evidence of OC while alive. The number of lesions in the tarsocrural (TC) joint and the TC OC score at 160 days were positively associated with average daily weight gain (ADG) in the previous 4 weeks (p=0.005 and p=0.001, respectively). There was no significant effect of sex, fatness, birthweight, weight at 160 days of age, or year of birth of the foal on the frequency and severity of OC lesions. CONCLUSIONS: Many of the lesions classified as OC, using classification systems described by other authors, were likely to be normal variations of the process of endochondral ossification. Despite the high frequency of such lesions, they were considered to be of minor significance and none were clinically evident. The distribution of lesions was not typical, and most probably reflected the subtlety of the lesions. These results support the hypothesis that Cu is an over-emphasised factor in the aetiopathogenesis of OC. The relationship between subtle macroscopic lesions and lesions resulting in clinical signs of disease requires further investigation.  相似文献   

Intracranial epidural mucocele in a cat     

Adamo PF 《Journal of the American Animal Hospital Association》2005,41(1):74-77

An 18-month-old, spayed female, domestic shorthaired cat was presented with clinical signs of depression and reluctance to walk, which progressed to nonambulatory tetraparesis. Increased opacification of both frontal sinuses and a cyst-like abnormality causing compression and displacement of the right frontal lobe were seen on computed tomography. Bilateral frontal sinus trephination and right transfrontal craniotomy revealed clear, viscous fluid in the right frontal sinus and rostral fossa, compatible with an intracranial mucocele. At a 6-month follow-up examination, no signs of recurrence were appreciated.  相似文献